Thrust Reverser Opening Detection via Engine Parameter Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing systems for detecting the opening of thrust reverser pivoting doors in aircraft turbojets are prone to false detections and malfunctions, leading to untimely engine speed adjustments and a need for validating detection information, especially in cases of breakdowns.
Innovation Solution
A method that continuously monitors operating parameters such as engine rotation speed or static pressure variations to validate the opening of thrust reverser mobile elements, using existing FADEC electronic systems and sensors to ensure accurate detection without additional hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electric contactor detection devices are used to detect thrust reverser closure and latching, then the detection function is provided, but false detection and malfunctions occur leading to unreliable detection
Solution Approach 1:
The system continuously monitors the operating parameter (rotation speed or static pressure) and uses this feedback to validate the detection of mobile element opening. The sudden variation in operating parameter serves as feedback confirmation that the electric contactor signal corresponds to a real opening event, not a false detection.
Solution Approach 2:
The operating parameter (rotation speed or static pressure) acts as an intermediary variable that indirectly confirms the opening state of the mobile element. Instead of relying solely on direct electric contactor signals, the system uses this intermediate physical parameter to validate the detection, providing an additional layer of verification.
2Reliability
If engine speed adjustment is implemented based on detection signals, then aircraft controllability is maintained, but untimely adjustments occur due to false detection
Solution Approach 1:
The system continuously monitors the operating parameter in advance, so when a mobile element opens, the sudden variation is immediately detected and validated before engine speed adjustment is triggered. This preliminary monitoring ensures the adjustment occurs at the correct moment, preventing both premature and delayed responses.
Solution Approach 2:
The continuous monitoring of operating parameter provides real-time feedback that validates whether an opening event has truly occurred. This feedback mechanism ensures engine speed adjustment is only implemented when confirmed by both the electric contactor signal and the operating parameter variation, preventing untimely adjustments.
3Reliability
If additional detection devices are added to validate opening detection, then detection reliability is improved, but device complexity increases
Solution Approach 1:
The operating parameter monitoring system serves multiple functions: it is used for normal engine control and simultaneously provides validation for mobile element opening detection. By reusing existing monitoring infrastructure for dual purposes, the system achieves enhanced detection reliability without adding dedicated validation hardware.
Solution Approach 2:
The system uses its own existing operating parameter monitoring capabilities to validate its detection function. The FADEC electronic system's built-in parameter monitoring serves the additional function of verifying mobile element opening, making the system self-validating without requiring external validation devices.
Data Source
AI summary
A method for detecting the opening of a thrust reverser for a jet engine of an aircraft is disclosed. According to the method, an operating parameter of the turbojet (1) is determined being responsive to the opening of a mobile element (2a, 2b) of the thrust reverser and reacting to such an opening by a sudden variation of the value thereof, the parameter is measured continuously and the mobile element (2a, 2b) is considered as being opened when the sudden variation is detected.